Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban voi toc snippets" » "ban moi toc snippets", "ba voi toc snippets", "ban noi toc snippets", "ban voi hoc snippets", "ban voi cuoc snippets", "ban voi quoc snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("ban voi toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban voi toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban voi toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban voi toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.